正则过滤字符串

<?php//中文编码包含UTF-8,GBK$str = "新_建&文\件,夹 abd";//获取结果$res = "新建文件夹abd";//包含非法字符：$out[0] = "_";$out[1] = "&";$out[2] = "\";$out[3] = " ";$out[4] = ",";?>

$str = "新_建&文\件,夹 abd";echo preg_replace('/[_&\\\,\s]+/u','',$str);

//中文编码包含UTF-8,GBK$str = "新_建&文\件,夹 abd";//获取结果$res = "新建文件夹abd";//包含非法字符：$out[0] = "_";$out[1] = "&";$out[2] = "\\";$out[3] = " ";$out[4] = ",";$pattern = join('|', array_map('preg_quote', $out));echo preg_replace("/$pattern/", '', $str);

echo preg_replace('/[^A-Za-z\p{Han}]+/u', '', "新_建&文\件,夹 abd");

<?php //源文件文件gbk编码$test = '新_建&文\件,夹a啊[?[ abd';$matches = array();$reg = "/[^a-zA-Z0-9\x80-\xff]/";preg_match_all($reg, $test, $matches);var_dump($matches);$str = '?';var_dump(ord($str[0]));var_dump(ord($str[1]));var_dump(ord('['));

$test = '新_建&文\件,夹a啊[?[ abd';$out = preg_split('/([a-zA-Z0-9]|[\x80-\xff].)+/', $test);$matches = array(); preg_match_all('/([a-zA-Z0-9]|[\x80-\xff].)/', $test, $matches);$res = implode($matches[1]);var_dump($res);$out = str_split(str_replace($matches[1], '', $test));var_dump($out);